Extracting |V(ub)| from the hadronic mass spectrum of inclusive B decays

Adam K. Leibovich; Ian Low; I. Z. Rothstein

doi:10.1016/S0370-2693(00)00756-5

Extracting |V(ub)| from the hadronic mass spectrum of inclusive B decays

Adam K. Leibovich^*, Ian Low, I. Z. Rothstein

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

Following a strategy introduced earlier by the authors, we show that it is possible to extract |V(ub)| from the cut hadronic mass spectrum of B decays without large systematic errors which usually arise from having to model the Fermi motion of the heavy quark. We present a closed form expression for |V(ub)|/|V(ts)| which is accurate up to corrections of order α(s)/², α(s)ρ, (Λ/m(b))²/ρ, where ρ is the experimental cut (s(c)/m²(b)) on the hadronic mass used to veto charmed decays. Modulo duality violation errors, which are intrinsic to all inclusive predictions, we estimate the theoretical error in the extraction to be at the 5% level. (C) 2000 Elsevier Science B.V.

Original language	English (US)
Pages (from-to)	86-91
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	486
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(00)00756-5
State	Published - Jul 27 2000

Funding

This work was supported in part by the Department of Energy under grant numbers DOE-ER-40682-143 and DE-FG03-92-ER 40701, and also by the NSF under grant number PHY94-07194. The authors would like to thank the theory group at Caltech for their hospitality. I.L. is supported in part by an ITP Graduate Fellowship.

ASJC Scopus subject areas

Nuclear and High Energy Physics

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title = "Extracting |V(ub)| from the hadronic mass spectrum of inclusive B decays",

abstract = "Following a strategy introduced earlier by the authors, we show that it is possible to extract |V(ub)| from the cut hadronic mass spectrum of B decays without large systematic errors which usually arise from having to model the Fermi motion of the heavy quark. We present a closed form expression for |V(ub)|/|V(ts)| which is accurate up to corrections of order α(s)/2, α(s)ρ, (Λ/m(b))2/ρ, where ρ is the experimental cut (s(c)/m2(b)) on the hadronic mass used to veto charmed decays. Modulo duality violation errors, which are intrinsic to all inclusive predictions, we estimate the theoretical error in the extraction to be at the 5% level. (C) 2000 Elsevier Science B.V.",

author = "Leibovich, {Adam K.} and Ian Low and Rothstein, {I. Z.}",

note = "Funding Information: This work was supported in part by the Department of Energy under grant numbers DOE-ER-40682-143 and DE-FG03-92-ER 40701, and also by the NSF under grant number PHY94-07194. The authors would like to thank the theory group at Caltech for their hospitality. I.L. is supported in part by an ITP Graduate Fellowship.",

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doi = "10.1016/S0370-2693(00)00756-5",

language = "English (US)",

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T1 - Extracting |V(ub)| from the hadronic mass spectrum of inclusive B decays

AU - Leibovich, Adam K.

AU - Low, Ian

AU - Rothstein, I. Z.

N1 - Funding Information: This work was supported in part by the Department of Energy under grant numbers DOE-ER-40682-143 and DE-FG03-92-ER 40701, and also by the NSF under grant number PHY94-07194. The authors would like to thank the theory group at Caltech for their hospitality. I.L. is supported in part by an ITP Graduate Fellowship.

PY - 2000/7/27

Y1 - 2000/7/27

N2 - Following a strategy introduced earlier by the authors, we show that it is possible to extract |V(ub)| from the cut hadronic mass spectrum of B decays without large systematic errors which usually arise from having to model the Fermi motion of the heavy quark. We present a closed form expression for |V(ub)|/|V(ts)| which is accurate up to corrections of order α(s)/2, α(s)ρ, (Λ/m(b))2/ρ, where ρ is the experimental cut (s(c)/m2(b)) on the hadronic mass used to veto charmed decays. Modulo duality violation errors, which are intrinsic to all inclusive predictions, we estimate the theoretical error in the extraction to be at the 5% level. (C) 2000 Elsevier Science B.V.

AB - Following a strategy introduced earlier by the authors, we show that it is possible to extract |V(ub)| from the cut hadronic mass spectrum of B decays without large systematic errors which usually arise from having to model the Fermi motion of the heavy quark. We present a closed form expression for |V(ub)|/|V(ts)| which is accurate up to corrections of order α(s)/2, α(s)ρ, (Λ/m(b))2/ρ, where ρ is the experimental cut (s(c)/m2(b)) on the hadronic mass used to veto charmed decays. Modulo duality violation errors, which are intrinsic to all inclusive predictions, we estimate the theoretical error in the extraction to be at the 5% level. (C) 2000 Elsevier Science B.V.

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EP - 91

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JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

ER -

Extracting |V(ub)| from the hadronic mass spectrum of inclusive B decays

Abstract

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